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When should I release objects in -(void)viewDidUnload rather than in -dealloc?
...wanted to elaborate more about logic behind -viewDidUnload.
One of the most important reasons for implementing it is that UIViewController subclasses commonly also contain owning references to various subviews in the view hierarchy. These properties could have been set through IBOutlets when loa...
Sending POST data in Android
... params[0]; // URL to call
String data = params[1]; //data to post
OutputStream out = null;
try {
URL url = new URL(urlString);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
out = new B...
ImageView 扩展：图片查看器扩展，支持缩放、双击缩放和动画缩放 · App In...
...式？
Q: 如何处理图片加载失败？
Q: 缩放操作会影响性能吗？
Q: 可以同时使用多个 ImageView 实例吗？
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ImageView 扩展
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detect key press in python?
...
For those who are on windows and were struggling to find an working answer here's mine: pynput
from pynput.keyboard import Key, Listener
def on_press(key):
print('{0} pressed'.format(
key))
def on_release(key):
p...
WheelView 拓展：滚轮选择框扩展，滚轮日历选择框和旋转日历扩展 · App In...
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滚轮选择框扩展
WheelView, like number picker, but can be ...
What is the difference between the kernel space and the user space?
...t mess with memory (and other resources) owned by other programs or by the OS kernel. This limits (but usually doesn't entirely eliminate) their ability to do bad things like crashing the machine.
The kernel is the core of the operating system. It normally has full access to all memory and machine ...
TaifunWiFi 拓展：WiFi Manager WiFi管理器扩展 · App Inventor 2 中文网
...和详细信息查询。该扩展经过多年发展，支持从基础WiFi操作到高级网络建议API的各种功能。
功能概述
WiFi Manager扩展提供以下核心功能：
WiFi状态控制（启用/禁用WiFi）
网络信息查询（SSID、BSSID、IP地址等...
How Do You Clear The IRB Console?
...
On Mac OS X or Linux you can use Ctrl + L to clear the IRB screen.
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Having Django serve downloadable files
I want users on the site to be able to download files whose paths are obscured so they cannot be directly downloaded.
15 An...
What is INSTALL_PARSE_FAILED_NO_CERTIFICATES error?
...lg) when you sign an APK.
I have JDK 7. In my Ant log, I used -v for verbose and it showed
$ ant -Dadb.device.arg=-d -v release install
[signjar] Executing 'C:\Program Files\Java\jdk1.7.0_03\bin\jarsigner.exe' with arguments:
[signjar] '-keystore'
[signjar] 'C:\cygwin\home\Chloe\pairfinder\releas...